Combined rectangular gauge and calipers



Patented June 5, 1928.

UNITED :STATES FRANK HonAx, or VALPARAISO,y INDIANA, AssIGNon or ONE-HALF To MAX mason, f ,A'orVALPARAISO,INDIANAl n v coiuisrnisny RECTANGU'LAR GAUGE ANDA CALIPERS.

` Appncatidn nieu .'Augjstia 1921. sefmifna-4aa745fj My invention r'elates to improvements inl combined rectangularA gauge and calipers and it more especiallyconsists. of the fea-, tures hereinafter pointed out in the annexed claims. f 'Y y The purpose of my invention isto provide a single gauge that maybe used instead of` numerous .separate gauges 4which have been used heretofore; that is adapted to universal adjustments' in terms yof/.rectan ular dimensions; that may be made ,witha l under. ysurfaces flushwith each other; thatmaycombine any desired style of scale'.graduations;

that cany be used equally well fby machinists ordraftsmen; that becomes adepth gauge capable of measuring more than one dimension at the same time; that is both an inside and an l outside caliper; that permits one scale and a nger body to bek used independently.y of the other thus `providing two dis-` tinctly separate measuring devices ;y that combinessuch separate devices into a single unit for caliper measurements ;and that may be used asa transfergauge which will carry more than one dimension at. the Sametime.

'With these vandv other. ends .in vi ev'v I illustrate in the accompanying drawlng such instances of adaptation kas will disclose the broad` underlying features without limiting myself to the specific details'shown thereon and which are describedherein.

Figure 1 isa top plan view of` a glvigf;

also showing an edge view of. a finger tip at a and a sectional end vview of a'finger Figure 2 is a bottom plan viewof a gauge.

Fig. 3 is anenlarged`elevat1onpartly 1n section of a slipin-clamping screw, withfa scale in positionand at B a lpla 1n section of the screw.

Fig. 4 is a similar to showing retained clamping screw with a planr viewr of it at C. 4

Fig. 5 shows two 1512111l v-iw'SOrfi'iflUiSh' clamping screws, aty D a circular one with beveled surfaces andk at E one with beveled chords. f

Fig..`6 vis an enlarged sectionall view l of a beveled scale and companion conical clamping screw in a linger body showing anunder surface without any projecting parts. Fig. 7 is a sectionalgdetail of a T shaped slot andscale.- The gauge exempliiied in the drawing is .4 eachof which has, a p rojectin ic'e it to saysome of them have already been referred to in k'the preamble andfa multitude.r i of unnoted ones will readily 'suggest them-v selves-to persons'who use the device. v The; devlce l1s extremely simple, comprising only four main parts, with'y four clampf-v f ing screws,- four thumb screws and two limitv ing pins.l Therearetwo .gaugebodies12 and f finger, 'e

finger 1 on body 2 and a similar finger 3 on body 4.'- Both ofthe'ngers have finger' tips 7 that in, actual size are al standard sub-mule` tiple of.v an inch in width, usually 1/8 inch each.i These tips are also thinned somewhat as .shown at w of Fig. 1. In this figure the body 2 ends just a little beyond the* limits of the rear `scale ,6 but the companion member'7 4,i s broken off,.su ggesting an extension-oa desired length. i

In 2 both members 2 and are shown pro]ect1ng beyondthe .edges of scale, ay

.greater distance than. member 2y does in Fig.

1. These dimensions can be changedas desired 1 vvith0ut departingV from the spirit "ofA mylnvention. f I l lMeasuring'lscales and 6 slide intransverse grooves `34 formedon the under side of the members 2- and 4inany desired relation .with respect to'. eachl other Aor to the linger.

bodies 2 vand4.. Theseorlany other typeof scales maybe graduated in anyv desired'man-` n er,y reading rom end toi-end in one direction, 1n reverse order, o r otherwise. Vhen the gauge is to be used asl acaliper, thescales may` be jmade 1 direct reading, whetherA yit'be used'y for inside'` or ."o ut`side calipering. This iSshown'in Figs;v 1V land vf2 wherein,` two notches 9 are formed in oneor vboth edges of eachof the scales and'. The 'relation of` these for caliperingr purposes lisespecially shown in,Fig. 2.'' V f i When the .tip ends 7 are used for inside measurements; a scale may be set like 6 with the limitl pin 11 in the hole 1()v of member y4' and'inthe inner groove 9 of the scale, then the distancethat the youter edges of ythe y'finger tips/7 are apart can be read' directly without making any allowances f'whateve'r at the edge ofthe"V notch 8 formedin, the `edge ofI the member 2 [facing the companion inner edge of member 4. lVhen'the tip ends 7 are used for'y outside measurements; one or both scalesv may be set like scale 5 of Fig. 2 with the limit pin 11 in the outer notch 9., `then the dimension can be read oil directly from the inner edge of member 2.

Whenever thegauge 1S used ffQr 1.0.1 other drafting purposes, both of vthe .scales maybe set similar to 5 in Fig. 2 but with the scale inverted; or if .thebeveledcedge scale 24 is used, holes l0 are formed in the center former casethe limitv holes in the'fscale corresponding ito the notches V9 would bear the same relation I"to notches .8 is the case with scales 5 and '.6. The limit pins "1l Vmay be .stored"7 on 'the member f4 `as shown in Fig. land if desired they may lbe threaded as'shown in Fig. 6 so as'to notbecome easily lost andalso-to ,form a precision limit stop. The dimensions of these ,andother partks'of Fig. :6 are only suggestive andthey do not bear any scalerelationtoy each ether.

The finger extensions or members 2 and 4, IFig. 2, have holes 12 for either of .the clamping screws 13 or 18. The former is shown in Fig. 3 andthe latter in fFig', 4. rI"he screw 13 is .a slipin screw fsolesig- I nated `because it can be removedas sonnes the scaleis withdrawn. Ithas a .threaded l stem 22 on which the thumb nut "16 turns..

On the under side of V.this nut a recess is formed in which .a .Spring '.17 is Plage@ so. as to abut Athe washer15. The clamping screw '18 `has an' enlarged head '19 which prevents the screw becoming detached ,nnl lessthe thumb l`nut .2,0 is removed ',rgm the threaded stem 21. Both of the'lower'ends of `screws ,13 and 18 have scale 'slots '1 4 orrnedy therein as is shown on 'the attached plan VGWVS, F-g. 31,]3 and "Fig 4 'The Scales 5 and f6 .and their -Clampin screws 11-3 1.18 .have Athe 'disadvantage in that theyproject away rom'the nnder lj'face of the gauge, nulliiying close readings on account of parallax." Scale33Jin"T .slot admits of flush under-surfaces'bnt does not eliminate. parallax- '.lhe Complete disappearance of parallax is securedby means of a double edged 'beveled .Scale '24: shmrn a in F ig..6 with which great accuracy canbe attained. For many'purposes where .such accuracy is vnotk required 'the presence of parallax 'in lscales l5,6, or 33l ,does not Aconsti-tute a practical objection.

'Bevelededg'e scales 24sl'ide inr under `cut ordovetail grooves23 andtheyare retained by means ofthe dovetai'l-top I face' 25 and they are held in any desiredflengthwise adjustment by means of clamping screw 29. This Ahas an enlarged head 27 01";31. At 27 it is shown conical on the under side to approximately fit the bevel edge of the scale it .a revel-Se :beveled .rim

-28 that .engages the lunder cut 25 of the scale and the tapering hole 26. At D Fig. 5 Vthis screw Lis shown `fin plan, and alongsidev at E the screw 29 is shown with a non- -conical Ehead that fhas Ia large beveled chord 3() indicated by .a vertical dotted line and a narrow chor'cll3'5.

27 'is that the scale-2 4 '.canbe inserted in theV slot without any reference Whatever ytol-the rotary position `of the screw; while iii-the case 'of'screws V13, 18, andthe head3l, they must Ibe *exactly aligned bef-ore fa `scale-can be `entered into a slot. The screw 29Vmay be tightened `by -.means of any suitable nut Steh as 16 1915"29; and 'if Ythev 'het 'iS-'t0 the prevented.l frein coming l entirely o if the screw, the threaded H.steIrrn-ay have #its outer vend upset 'as is shown 'in fFig. 4.

i I do not `limit myself to fthe exact exempliications shovvnand described, las wide changes canbe made-inftheaccessory parts which .will still if'all within the scope of j permissible equivalents and micrometric adjustments of the lscales may 'be provided fas desired to 'the extent tha-t certain ada-ptations are necessary -tcmeet 4special -exigencies vlnlcombi-ned measuring scales, a unit member having j a' projection -theretrom ments, respectively, a pair.- of separatescales s lidable acrcss bothf'members the position of one ofsaidfscales inllsuch membersbeing a dinect-reading indication yof an y"internal measurement and the position' y of v the ether scale inthe unit members being a directread'ing v indication of an external dimension, and meansfor securingethe scales'and members'to each othery as desired.

3. In measuring scales, a Vpai-r 9i relatively 2Vflat un-it memberseach one having an extension whose lopposite edges are adapted Hfor internal 'or' external measure- One of he advantagesof the conical I head ments, respectively, a pair of separatescales respectively by the opposite edges 0f the slidable across such members with the runder unit member projections, and means on the faces of the scales and said members being members Hush with the under side of the 10 approximately flush with each other one of. scales and members for clamping the parts such scales serving to indicate the internal to each other. s f f l dimensions and the other one serving to in- In testimony whereof I aix m signature. dicate the external dimensions determined FRANK ORAK. 

